Chapter 7 - Standpipe and Hose Systems Flashcards Preview

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Flashcards in Chapter 7 - Standpipe and Hose Systems Deck (51)
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1
Q

Because the fire pump discharge pressure necessary to reach the top floor of a 50-story building may be ______ to ______ psi, the proper operation of the standpipe system is critical.

A

350 to 400

p 172

2
Q

____________ __________ continue to be the most effective method of fire control.

A

Automatic sprinklers

p 172

3
Q

Which NFPA standard is used for the design and installation of standpipes ?

A

NFPA 14, Standard for the Installation of Standpipes and Hose Systems

p 172

4
Q

Classes of Standpipes systems:

_______ __ standpipe systems are primarily for use by fire-suppression personnel trained in handling large hoselines.

A

Class I

p 173

5
Q

A Class I system provides _____ inch hose connections or hose stations attached to the standpipe riser.

A

2 1/2

p 173

6
Q

Classes of Standpipe systems:

The ______ ___ system is primarily designed for use by building occupants who are trained in its use or by FD personnel.

A

Class II

p 173

7
Q

Classes of Standpipe systems:

These systems are equipped with 1 1/2 hose and nozzle and stored on a hose rack system ?

A

Class II

p 173

8
Q

Classes of Standpipe systems:

The hose used in these systems is typically a single jacket type and equipped with a lightweight, twist-type shut-off nozzle ?

A

Class II

p 173

9
Q
  • Permanently fixed, private standpipe hoseline.
A

House Line

p 173

10
Q

Classes of Standpipe systems:

This system provides 1 1/2 inch hose stations to supply water used by building occupants who have been trained and 2 1/2 inch hose connections to supply a larger volume of water used by FDs and those trained in handling heavy fire streams ?

A

Class III

p 173

11
Q

Types of standpipe systems:

  • ___________ ______ - This system contains water at all times. The water-supply control valve is open and pressure is maintained in the system at all times.
A
  • Automatic wet

p 174

12
Q

Types of standpipe systems:

  • __________ ______ - This system contains air pressure to supervise the integrity of the piping. Water is admitted to the system through a dry pipe valve upon the opening of a hose valve. This system has a permanently attached water supply.
A
  • Automatic dry

p 174

13
Q

Types of standpipe systems:

  • ______________ ______ - This is a standpipe system that is attached to a water supply that is capable of supplying the system demands at all times. It requires activation of a control device to provide water at hose connections.
A
  • Semiautomatic dry

p 174

14
Q

Types of standpipe systems:

  • _________ ______ - This system does not have a permanent water supply. It is designed to have water only when the system is being utilized through the FDC.
A
  • Manual dry

p 174

15
Q

Types of standpipe systems:

  • _________ _____ - There is no permanent water supply for this system, and water must be provided by the FD. It is maintained full of water from a small source for the purpose of detecting leaks in the system.
A
  • Manual wet

p 174

16
Q

Types of standpipe systems:

This system is the most desirable because water is constantly available at the hose station but cannot be used in cold environments ?

A

Automatic wet

p 174

17
Q

In high-rise buildings with multiple zones, the upper zones may be beyond the height to which a fire engine can effectively supply water. This height is usually around ______ feet, depending on the available hydrant pressure and other factors.

A

450

p 175

18
Q

Standard requirements specify that there shall be no _________ valve between the FDC and the standpipe riser.

A

shutoff

p 175

19
Q

Each FDC is required to have at least _____ _____ inch connections or more as prescribed by the AHJ for fire department use.

A

two 2 1/2

p 175

20
Q

FDC

In addition, there should be at least one _____ inch connection for each ______ gallons per minute of system demand.

A

2 1/2 / 250

p 175

21
Q

The hose connection to the FDC typically have a _______ connection with National Hose Standard _________ and should be equipped with standard cap plugs, approved break away covers or locking caps.

A

female / threads

p 175

22
Q

Two different factors to consider with regards to the use of water with standpipe systems are ?

A

water supply and water pressure

p 176

23
Q

Water supply:

The water supply for Class I and Class III standpipe systems should provide _____ gpm for at least ____ minutes with a residual pressure of _____ psi at the most hydraulically remote 2 1/2 inch outlet.

A

500 gpm / 30 minutes / 100 psi

p 176

24
Q

Water supply:

A minimum of ____ psi is required for the most remote 1 1/2 inch outlet.

A

65

p 176

25
Q

Water supply:

If more than one standpipe riser is needed to protect a building, the water supply must provide _____ gpm for each additional riser to a maximum of ________ gpm for an unsprinklered building and _______ gpm for a sprinklered building.

A

250 / 1250 / 1000

p 176

26
Q

Water supply:

For Class II standpipes, _____ gpm must be provided for at least _____ minutes with residual pressure of at least ____ psi at the highest outlet.

A

100 / 30 / 65

p 176

27
Q

The current NFPA _____ minimum requirement for residual pressure is ____ psi for 1 1/2 inch hose connections and _____ psi for 2 1/2 inch hose connections.

A

14 / 65 / 100

p 176

28
Q

What two considerations determine the size of the standpipe riser ?

A

height of the building and class of service

p 176

29
Q

For Class I and Class III service, the minimum riser is ____ inches for building heights less than 100 feet and ____ inches for heights over 100 feet.

A

4 / 6

p 176

30
Q

When Class I or Class III standpipe exceeds 100 feet in height, the top 100 feet is allowed to be ____ inch pipe.

A

4

p 176

31
Q

Standpipes that are part of a combined system (those that include a sprinkler and standpipe) are ____ inches.

A

6

p 176

32
Q

For Class II service, a riser should be ____ inches for a building height less than 50 feet. For a building over 50 feet in height, the minimum size riser is _____ inches.

A

2 / 2 1/2

p 176

33
Q

Current system design practice is to locate standpipes so that any part of a floor is within _____ feet of the standpipe connection. This distance allows any fire to be reached with _____ feet of hose, plus _____ foot fire stream.

A

130 / 100 / 30

p 177

34
Q

The actual standpipe hose connection can be located not less than ____ feet and not more than ____ feet from floor level.

A

3 / 5

p 177

35
Q

In tall buildings the pressure on the system at the lower floors is so great it can make hoses difficult to handle. In these cases, ____________-___________ valves may be required to keep operating pressures below _____ psi.

A

pressure-reducing / 175

p 177

36
Q

When one pump takes in water from the discharge of another, the pumps are said to be arranged in ?

A

series

p 177

37
Q

In high rise buildings with several zones, the upper-zone pumps may be arranged to draft from tanks of the ?

A

upper floors

p 178

38
Q

Water pressure:

The tanks, which hold several ___________ gallons of water, are filled automatically from the lower-zone fire pumps and/or the domestic water supply pumps by means of ___________ __________ valves.

A

thousand / automatic float

p 178

39
Q

NFPA standards require a pressure-regulating device at a hose outlet that exceeds _____ psi for a 1 1/2 inch connection and _____ psi for a 2 1/2 inch connection.

A

100 / 175

p 178

40
Q

Pressure regulating devices:

  • ______________ ____________ devices - Consist of a simple restricting orifice inserted into the waterway.
A
  • Pressure-restricting

p 178

41
Q

Pressure-restricting devices are limited to systems with ____ inch hose discharges and _____ psi maximum pressure.

A

1 1/2 / 175

p 178

42
Q

These devices are not preferred type because they do not control or reduce the water pressure in the system ?

A

Pressure-restricting devices

p 178

43
Q

Pressure regulating devices:

Preferred for managing excessive pressure and considered to be the most reliable method of pressure control ?

A

Pressure-control valves

p 178

44
Q

Pressure-control valves use a ______ _____ and ______ to read the pressure and automatically reduce the flow through the discharge.

A

pitot tube and gauge

p 178

45
Q

Pressure regulating devices:

Preferred for managing excessive pressure and uses a spring mechanism that compensates for variations in pressure ?

A

Pressure reducing valves

p 179

46
Q

A standpipe system is a significant component in a buildings ___________.

A

design

p 179

47
Q

In high rise buildings the standpipe should be in _________ ____________ as construction proceeds to provide protection during construction.

A

partial operation

p 179

48
Q

Initial installation inspection and testing:

  • The system should be hydrostatically tested at a pressure of at least ______ psi for ____ hours to ensure tightness and integrity of fittings. If the normal operating pressure is greater than ______ psi, the system should be tested at _____ psi greater than its designed pressure.
A

200 / 2 / 150 / 50

p 179

49
Q

Initial installation inspection and tests

  • The system should be ______-__________ to remove any construction debris and ensure that there are no obstructions.
A
  • flow-tested

p 179

50
Q

Hose stations and connections should be checked to ensure that they are located in cases not less than ____ feet and not greater than ____ feet from the floor and are positioned so that the hose can be attached to the valve without __________.

A

3 / 5 / kinking

p 179

51
Q

In service inspections:

  • Dry systems are hydrostatically tested every ____ years.
A

5

p 181